Q. The combustion of methane (CH₄) is an example of a:

मीथेन (CH₄) का दहन इसका एक उदाहरण है:

Nonspontaneous, endothermic reaction
गैर-सहज, एंडोथर्मिक प्रतिक्रिया

Spontaneous, endothermic reaction
सहज, एंडोथर्मिक प्रतिक्रिया

Nonspontaneous, exothermic reaction
अनायास, ऊष्माक्षेपी प्रतिक्रिया

Spontaneous, exothermic reaction
सहज, ऊष्माक्षेपी प्रतिक्रिया

Combustion of methane:

\text{CH₄ + 2O₂ → CO₂ + 2H₂O + heat}

It releases heat (ΔH < 0), increases entropy, and occurs naturally, hence it is spontaneous and exothermic.

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